Carboxyl-containing isobutene copolymers

US5473022A · kind A · utility

Assignee

• BASF SE

Inventors

• Andreas Deckers · Flomborn, DE
• Hans-Joachim Muller · Remscheid, DE
• Roger Klimesch · Ransbach-Baumbach, DE
• Eckehardt Witsuba · Bad Dürkheim, DE
• Heinz Plaumann · Charlotte, US
• Erich Kolk · Bad Dürkheim, DE
• Gunther Isbarn · Ludwigshafen, DE
• Karl-Heinz Fauth · Wattenheim, DE
• Joachim Krobb · Landau, DE

Key dates

• Filing date: Sep 2, 1994
• Grant date: Dec 5, 1995
• Expiry date: Sep 2, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F2810/20
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Carboxyl-containing isobutene copolymers are obtainable PA1 a) by cationic polymerization of a mixture of from 1 to 99 mol % of isobutene and from 99 to 1 mol % of a 2-methylalk-1-ene at less than 20.degree. C. in the presence of a halogen-containing Lewis acid and PA1 b) subsequent grafting of the isobutene copolymer obtainable in this manner with an .alpha.,.beta.-ethylenically unsaturated carboxylic acid or carboxylic acid derivative at above 100.degree. C. and in the presence of a free radical initiator. Such carboxyl-containing isobutene copolymers are particularly suitable as adhesive raw materials or as sealing compounds.